Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.
Thank you for posting your comment in the forum.
If you are interested in monetizing through Appstore, you may find below links helpful.
1 Person is following this question.
Why amazon suppressed apps and amazon developer accounts when the apps are in top ranking?
How to transfer my games to another rightholder
Does Amazon now have a single 'unified' portal for all markets or are there steps that must be taken to move it from one market to another?
GENERAL NOTICE: PLEASE READ BEFORE ASKING A QUESTION
Our developer account banned instead of thieves account